Beneficial Bacteria, as the name suggests, have a beneficial effect on the pond water as they remove pond waste. They also provide a health benefit to the fish and other aquatic animals that live in the pond.
The stimulated microbial growth starts as soon as the bugs enter the water and, as long as they have enough food (organic pond waste), oxygen (the more the better), and the pond water is the right temperature, they will not only grow but multiply.
Beneficial Bacteria for ponds
Why do people put beneficial bacteria in their pond and what are they good for? Bacteria will breakdown your pond waste and reduce your pond maintenance if added on a regular basis.
Beneficial BacteriaRegardless of type, the biological filtration is being done by slow-growing, living colonies of oxygen-loving bacteria that convert the toxic ammonia that fish and other animals excrete to benign nitrate, and that feeds the pond's plants. Without these "nitrifying bacteria" ammonia levels would quickly rise, and levels as low as 3 parts per million would kill all the fish in the pond. So, to maintain the ammonia cycle, you want to keep well-aerated (and well-fertilized) pondwater constantly moving over and through the surfaces that the bacteria colonize.
In a crowded pond (and most ornamental fish ponds are overstocked), if you kill the bacteria, you kill the fish that depend on them. So, when it comes time to clean any biological filter media, DON'T USE CHLORINATED TAP WATER. Rinsing the media in pondwater will preserve the bacterial colonies that keep the fish alive.
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